Question

Have the function arraychallenge (arr) take the array of numbers stored in arr and determine the total number of duplicate entries. for example if the input is (1, 2, 2, 2, 3) then your program should output 2 because there are two duplicates of one of the elements.?

Answer 1

You can create a Python function called arraychallenge to determine the total number of duplicate entries in an array. Here's one way to implement it:

def arraychallenge(arr):

# Create a dictionary to store the count of each element

element_count = {}

duplicates = 0

# Count the occurrences of each element in the array

for num in arr:

if num in element_count:

element_count[num] += 1

else:

element_count[num] = 1

# Count the number of elements with more than one occurrence

for count in element_count.values():

if count > 1:

duplicates += 1

return duplicates

# Test the function

arr = [1, 2, 2, 2, 3]

result = arraychallenge(arr)

print(result) # Output will be 2

This code first counts the occurrences of each element in the array using a dictionary and then checks how many elements have a count greater than 1, which indicates duplicates. In this example, it will output 2 because there are two duplicates of the element 2 in the input array

Step-by-step explanation: